68057931 has 4 divisors (see below), whose sum is σ = 90743912. Its totient is φ = 45371952.

The previous prime is 68057929. The next prime is 68057933. The reversal of 68057931 is 13975086.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (68057929) and next prime (68057933).

It is not a de Polignac number, because 68057931 - 2¹ = 68057929 is a prime.

It is a super-2 number, since 2×68057931² = 9263763944001522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68057931.

It is not an unprimeable number, because it can be changed into a prime (68057933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11342986 + ... + 11342991.

It is an arithmetic number, because the mean of its divisors is an integer number (22685978).

Almost surely, 2^68057931 is an apocalyptic number.

68057931 is a deficient number, since it is larger than the sum of its proper divisors (22685981).

68057931 is a wasteful number, since it uses less digits than its factorization.

68057931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22685980.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 68057931 is about 8249.7230862617. The cubic root of 68057931 is about 408.2813862928.

The spelling of 68057931 in words is "sixty-eight million, fifty-seven thousand, nine hundred thirty-one".